#include <STC15F2K60S2.H>
static void I2C_Delay(unsigned char n);
void I2CStart(void);
void I2CStop(void);
void I2CSendByte(unsigned char byt);
unsigned char I2CReceiveByte(void);
unsigned char I2CWaitAck(void);
void I2CSendAck(unsigned char ackbit);
void init_pcf8951(void);
unsigned char red_data_pcf8951(void);